6531451641 has 96 divisors (see below), whose sum is σ = 11321436672. Its totient is φ = 3576545280.

The previous prime is 6531451639. The next prime is 6531451673. The reversal of 6531451641 is 1461541356.

6531451641 is a `hidden beast` number, since 6 + 5 + 3 + 1 + 4 + 5 + 1 + 641 = 666.

It is not a de Polignac number, because 6531451641 - 2¹ = 6531451639 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6531451596 and 6531451605.

It is not an unprimeable number, because it can be changed into a prime (6531451621) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 14106576 + ... + 14107038.

It is an arithmetic number, because the mean of its divisors is an integer number (117931632).

Almost surely, 2^6531451641 is an apocalyptic number.

It is an amenable number.

6531451641 is a deficient number, since it is larger than the sum of its proper divisors (4789985031).

6531451641 is a wasteful number, since it uses less digits than its factorization.

6531451641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 703 (or 700 counting only the distinct ones).

The product of its digits is 43200, while the sum is 36.

The square root of 6531451641 is about 80817.3968957179. The cubic root of 6531451641 is about 1869.2608287574.

Adding to 6531451641 its reverse (1461541356), we get a palindrome (7992992997).

The spelling of 6531451641 in words is "six billion, five hundred thirty-one million, four hundred fifty-one thousand, six hundred forty-one".